12540789 has 12 divisors (see below), whose sum is σ = 18739500. Its totient is φ = 8072064.

The previous prime is 12540769. The next prime is 12540791. The reversal of 12540789 is 98704521.

12540789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3359889 + 9180900 = 1833^2 + 3030^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12540789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23764 + ... + 24285.

It is an arithmetic number, because the mean of its divisors is an integer number (1561625).

Almost surely, 2^12540789 is an apocalyptic number.

It is an amenable number.

12540789 is a deficient number, since it is larger than the sum of its proper divisors (6198711).

12540789 is a wasteful number, since it uses less digits than its factorization.

12540789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48084 (or 48081 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12540789 is about 3541.2976435200. The cubic root of 12540789 is about 232.3316019587.

The spelling of 12540789 in words is "twelve million, five hundred forty thousand, seven hundred eighty-nine".